(2α,3α,5α)-2,3-epoxy-21-hydroxypregnan-20-one cyclic 20-(1,2-ethanediyl acetal) 、
2,2-二甲基吗啉 在
(3α,4α,5α)-3,4-epoxy-21-hydroxypregnane-11,20-dione cyclic 20-(1,2-ethanediyl acetal) 作用下,
以
乙二醇 为溶剂,
反应 4.0h,
生成 (2S,3S,5S,8R,9S,10S,13S,14S,17S)-2-(2,2-Dimethyl-morpholin-4-yl)-17-(2-hydroxymethyl-[1,3]dioxolan-2-yl)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-ol